jester700

If you want to do this manually, the parametric will work, and there are a number of free real time analyzer apps that will help you ring out the system. It IS much easier to just put one of those Behringers (or - better IMO - an old Sabine Solo) inline with the mic. Is the feedback coming from the house or a monitor? If it's from a monitor, I'd put a de-feedbacker device on the monitor feed, leaving the signal to the house PA untouched.

I sometimes have my Helix through my stereo system - 8" JBL in-wall speakers and a sub in the corner - very little floor space taken up. Or my 8" 2-way studio monitors. Sounds plenty full, though I do tune to E. Might not be as good on a 7 string or something.

https://medias.audiofanzine.com/files/helixlt-cheatsheet-480092.pdf

I've heard and like the Shures, but never owned them, and have no experience with the others mentioned, but would like to offer another closed options you may want to listen to. I love my NAD HD50 headphones. After years of using Sony MDR7506 and Sennheiser HD250, I consider these a big improvement from those (Sonys are kind of boom/sizzle and Sennheisers are midrangey) In response to the greater discussion, we really can't make any claims about impedance being the main factor in the sound of Helix when cans sound so different in the first place. My 32 ohm NADs sound better IMO than the other two types I own, but are lower impedance. The only way to really know is to take a model that has multiple versions, like a Beyer DT770 (available in 32, 80, and 250 ohm versions) and A/B those. Well, I guess A/B/C them...

I measured these. The FiiO gives me 40ms delay. My generic $15 non-AptX receiver is 130ms! So, definitely an improvement. I'll stop bothering you guys now... ;-)

I got my toys. I think the delay with this combo is likely in the 30-40ms range. It bugs me, so I don't think I'll use this for guitar, but I do think it's in the "YMMV" range. It does work great for its intended use - keeping sync with video. It doesn't bug me there (though you can usually adjust sync in modern media player software anyway).

I'm trying another combination, as I wanted a "Class 1" transmitter capable of further distance, while still being AptX LL. There are many ~$50 ones that look like they're the same build, but this was on a "lightning deal" for $35: https://www.amazon.com/gp/product/B07JZH47B3/ I thought about the Avantree receiver, but figured I'd try a FiiO because of the good reviews of its sound quality: https://www.amazon.com/gp/product/B07JM5ZQPF I'll post how well they work...

I would buy one of those.

Just to update - this spring's Native v. 1.80 is supposed to eliminate the limitation. Add as many blocks as your CPU can handle...

I'd set the tone controls to flat on the receiver. Phono IS different - it has much more gain and a heavy RIAA EQ curve to compensate for deficiencies in vinyl. Your signal will be distorted, bassy, and dull using that input. I use the 1/4" out for my similar setup (and the impedance is a better match), but you could get away with the headphone out. You can tweak with global EQ, but cabinet and mic settings should get you close. Yes, using a mic model will get you closer to what you're used to as recorded guitar tones. Don't sweat any theoretical EQ adjustments for those specific speakers. They interact with your room in a way that is specific to your speakers, with your placement, in your room, in your listening position. So tweak it to your own ears, maybe using recordings you like as a guide.